RayTracer/Vec3.cpp at master · pedroafonso18/RayTracer · GitHub

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#include "Vec3.h"

vec3::vec3() : e{0,0,0} {}

vec3::vec3(double e0, double e1, double e2) : e{e0, e1, e2} {}

double vec3::x() const {
    return e[0];
}

double vec3::y() const {
    return e[1];
}

double vec3::z() const {
    return e[2];
}

vec3 vec3::operator-() const {
    return vec3(-e[0], -e[1], -e[2]);
}

double vec3::operator[](int i) const {
    return e[i];
}

double &vec3::operator[](int i) {
    return e[i];
}

vec3 &vec3::operator+=(const vec3 &v) {
    e[0] += v.e[0];
    e[1] += v.e[1];
    e[2] += v.e[2];
    return *this;
}

vec3 &vec3::operator*=(double t) {
    e[0] *= t;
    e[1] *= t;
    e[2] *= t;
    return *this;
}

vec3 &vec3::operator/=(double t) {
    return *this *= 1/t;
}

double vec3::length() const {
    return std::sqrt(length_squared());
}

double vec3::length_squared() const {
    return e[0]*e[0] + e[1]*e[1] + e[2]*e[2];
}